Samuel pierce



S. PIERCE.

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' Patented July I4, 1868;

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Letters PatentNo. 80,007, dated July 14;, 1868.

IMPROVEMENT IN BASE-BURNING STOVES.

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TO ALL WHOM IT MAY CONCERN:

Be it. known that I, SAMUEL PIERCE, of Boston, in the county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Furnaces; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accompanying drawings, and 'to the letters of reference marked thereon. i l

I The nature of my invention consists in arranging the several parts of afurnace so as to adapt it to the combustion of bituminous fuel; said arrangement and construction of parts being such that they cannot clearly be understood without an examination of drawings and specification.

In the drawings-- Figure 1 is a perspective view of my improved furnace.

Figure 2 is a vertical section of the same.

Figure 3 is a horizontal .section on the line any, fig- 2.

I construct my furnace as follows:

- A Bis the furnace proper, in which the ash-pit, fire-pot, coal-receptacle, and combustion-chamber are enclosed. G D is .a radiating drum, through which the heated products of combustion circulate, and havetime to yield their heat to the air fiowingaround the drum C and through the tubes P P, lite;

E, figs. 2 and 3, represent the grate, above which the fire-pot V V is placed. The upper part of the firepot is divided into twocompartments, U U, by the partition L H K, fig. 2, so that the coal, which is supplied at M, will not be consumed in U V above K, complete combustion taking place in V, between the air-ducts K K and immediately above that point.

The chamber H, the walls of which form the partition between the fire-chamber U and the coal-receptacle U, is made water-tight,-and is connected at H-I-I, fig. 1, to supply and return-pipes, leading to a. convenientlylocated cistern, so that it can be filled with water, which will prevent its being excessively heated and thus destroyed.

K is an air-duct, connected immediately to the water-tank, and thus kept comparatively cool.

a a a, fig. 2, represent a series of perforations made in the air-duct K, through which air is supplied to support combustion.

K is an air-duct, similar to K, and provided with perforationsb b b.

N is a chamber or recess, which may be used as an oven, if desired. T, fig. 2, is the ash-pit, having a door,

Il. O, figs. 1 and 2, represents the directdraught, leading from thecombustion-chamber into the flue, and is provided with a suitable damper, to be usedonlyvhen kindling the fire.

S, figs. 2 and 3, represents the draughtfrom the combustion-chamber into the radiating-drum. The heated products of combustion pass into the drum, and, circulating around the pipes P P, pass down through the openingsQ Q, figs. 2 and 3, into the lower drum D, whence they pass through thepipe O O to the chimney.

The drum D, fig. 2, forming the lower part of the radiating-drum, serves, aside from its use as a radiator, as a receptacle for the deposit of any ashes, dust, &c., that may be brought over from the furnace by the draught. D is a door, for convenience in cleaning out the drum D.

The pipes P are open at both ends, so as to allow the air to How freely through;

The entire furnace may be set in brick, or enclosed in an external cylinder of metal. The pipes for the supply of hot air may be arranged in any of the ordinary methods. I

What I claim as 'my invention, and desire to secure by Letters Patcnt, is-

1. In base-burning stoves, making the walls, which divide the coal-receptacle from the ignition-chamber,

double, and enclosing water, said water serving to preserve the said walls, and also for heating purposes.

2. The combination of the radiating-drum G with the ash-receptacle D, arranged and operating as described.

' SAMUEL PIERCE.

Witnesses:

FRANK G. PARKER, A. HUN BERRY. 

